"Yet if we make the investment that's needed and focus our efforts on ensuring we are ready on day one for Brexit at the Dover front line, we can continue to trade seamlessly - just as we do now with the rest of the world."

Former Tory leader Iain Duncan Smith added: "They are frozen in the headlights.

"They should be planning for what happens if there is no deal, not scaring the pants off each other.

"We need people with imagination and courage, not frightened rabbits."

What is a 'no deal' Brexit and will Britain end up crashing out of the EU?

THERESA May and her ministers are confident that Britain will secure a deal with the EU after we leave the bloc.

This is set to include a "bold and ambitious" trade deal too, so we can continue to carry on exchanges of goods similar to how we do it now.

But Brexiteers want the UK to be prepared for no deal - so we can walk away if their hardline demands aren't in our interests.

Ministers say they are preparing too for the scenario, so we've got every base covered in a possible new system.

That would then mean we would revert to World Trade Organisation rules - which many countries around the world use.

And we could need to upgrade both physical infrastructure and staffing at Britain's borders and customs points.

But another option is that customs checks could be axed to try and keep goods moving along - keeping things much the same as they are now.

Even if we didn't strike a deal, we would continue to work closely with the bloc in security and other Europe-wide issues.